I've always heard that red shakers were only available on red cars in 1970 only with the A22 front and rear elastomeric bumper package. This also included dual outside painted mirrors.
CODY,. and this is your car, optioned just as such. However, the date of release for the red shaker bubble is in question. Date pf car production and shaker bubble release need to coincide. Getting alot of conflicting information on shaker releases, so I can't answer your question.
Did you look at the shaker bubble on your car and the date code on it, compared to your production date?